The name of the track game is chain tension. If you get a cheapo, poorly made sprocket for your board warrior chariot, you'll end up with something that just wilts under your massive power output. The result is a cog that's noisy, and doesn't perform up to your expectations. So equip your steed with the Shimano Dura-Ace ½" x 1/8" track cog. Its precision machined out of high-quality, hard-wearing chromoly steel to the standards you'd expect from anything with "Dura-Ace" stamped on it.
Item No. » SH-DATC
Nashbar: $39.991 or more: $39.99